Synthesis and Characterization of Novel Terpolymers as Viscosity Index Improvers Using Industrial Waste for Iraqi Lubricating Oil

Ziyad Tarik AL-Malki; Moayad Naeem Khalaf

doi:10.22146/ijc.90670

Synthesis and Characterization of Novel Terpolymers as Viscosity Index Improvers Using Industrial Waste for Iraqi Lubricating Oil

https://doi.org/10.22146/ijc.90670

Ziyad Tarik AL-Malki^(1*), Moayad Naeem Khalaf⁽²⁾

(1) Department of Polymer Technology, Polymer Research Center, University of Basrah, Basrah 61004, Iraq
(2) Department of Chemistry, College of Science, University of Basrah, Basrah 61004, Iraq
(*) Corresponding Author

Abstract

The potential utilization of industrial waste, specifically polyethylene wax, to enhance the efficiency of alkyl acrylate polymers as viscosity index improver (VII) additives in lubricating compositions has been investigated. Four terpolymers (w1, w2, w3, and w4) were synthesized via free radical polymerization, incorporating hexyl acrylate, 1-tetradecene, and industrial waste-sourced polyethylene wax at varying molar ratios. These terpolymers were characterized through gel permeation chromatography (GPC) for molecular weight determination, Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (¹H-NMR) spectroscopy for chemical structure analysis, and thermal gravimetric analysis (TGA) for thermal stability assessment. The study evaluated the efficiency of these terpolymers as viscosity index improvers (VII) in combination with free additives Iraqi lubricating oil (base oil 60). Our results demonstrate the feasibility of significantly enhancing the efficiency of viscosity improvers through the utilization of industrial waste, with improvements proportional to terpolymer concentration. The terpolymer w3, characterized by a balanced molar ratio of 1:1:1, exhibiting the highest degree of efficacy, which gave VI of 206 at 5 wt.% concentration compared with free additive lubricating oil, which gives VI of 98. This study offers promising insights into the sustainable use of industrial waste to improve lubricating compositions.

Keywords

kinematic viscosity; lubricating oil; polyethylene wax; terpolymer; viscosity index improvers

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References

[1] Nassar, A.M., 2008, The behavior of polymers as viscosity index improvers, Pet. Sci. Technol., 26 (5), 514–522.

[2] Jalilian, S.M., and Ziaee, F., 2019, Polymerization parameters of methacrylic acid esters as viscosity index improvers in lubricants, Iran. J. Polym. Sci. Technol., 32, 123–34.

[3] Rizvi, S.Q.A., 2009, A Comprehensive Review of Lubricant Chemistry, Technology, Selection, and Design, ASTM International, West Conshohocken, US.

[4] Singh, A., Verma, N., Mamatha, T.G., Kumar, A., Singh, S., and Kumar, K., 2021, Properties, functions and applications of commonly used lubricant additives: A review, Mater. Today: Proc., 44, 5018–5022.

[5] Al-Shafey, H.I., and Arafa, E.I., 2018, Synthesis and evaluation of multifunction co-polymer as lubricating oils additives, Pet. Petrochem. Eng. J., 2 (4), 1–9.

[6] El-shazly, R.I., Kamal, R.S., Nassar, A.M., Ahmed, N.S., and Sayed, G.H., 2020, The behavior of some terpolymers as lubricating oil additives, Appl. Petrochem. Res., 10 (3), 115–123.

[7] Salih, F.S., Zaidan, R.K., and Ali, K.A.R., 2022, Preparation of the antioxidant compounds from the styrene and p-benzoquinone compounds to the lubricant oils, Misan J. Acad. Stud., 21 (44), 299–318.

[8] Cusseau, P., Bouscharain, N., Martinie, L., Philippon, D., Vergne, P., and Briand, F., 2018, Rheological considerations on polymer-based engine lubricants: viscosity index improvers versus thickeners—generalized Newtonian models, Tribol. Trans., 61 (3), 437–447.

[9] Lomège, J., Negrell, C., Robin, J.J., Lapinte, V., and Caillol, S., 2020, Synthesis of alkyl sulfur‐functionalized oleic acid‐based polymethacrylates and their application as viscosity index improvers in a mineral paraffinic lube oil, J. Am. Oil Chem. Soc., 97 (3), 309–318.

[10] Mohammed, A.K., and Khalaf, M.N., 2021, Synthesis and characterization of copolymers as pour point depressants and viscosity index improvers for lubricating oil, J. Kufa Chem. Sci., 2 (9), 264–285.

[11] Jwaid, T.A., Khalaf, M.N., and Abbo, H.S., 2022, Synthesis and characterization of new long chain aliphatic polyesters derived from dicarboxylic acid with diols using p-toluene sulfonic acid as catalyst, J. Kufa Chem. Sci., 2 (8), 157–171.

[12] Covitch, M.J., and Trickett, K.J., 2015, How polymers behave as viscosity index improvers in lubricating oils, Adv. Chem. Eng. Sci., 5 (2), 134–151.

[13] Li, G., Hua, Q., Huang, Z., and Da, Z., 2023, Progress on polymethacrylate as viscosity index improvers for lube oil, Chem. Ind. Eng. Prog., 42 (3), 1562–1571.

[14] Patterson, R.A., Kabb, C.P., Nickerson, D.M., and Pashkovski, E., 2022, Compositionally driven viscometric behaviors of poly (alkyl methacrylates) in lubricating oils, Adv. Chem. Eng. Sci., 12 (2), 65–86.

[15] Martini, A., Ramasamy, U.S., and Len, M., 2018, Review of viscosity modifier lubricant additives, Tribol. Lett., 66 (2), 58.

[16] Panwar, P., Schweissinger, E., Maier, S., Hilf, S., Sirak, S., and Martini, A., 2022, Effect of polymer structure and chemistry on viscosity index, thickening efficiency, and traction coefficient of lubricants, J. Mol. Liq., 359, 119215.

[17] Mu, L., Wu, J., Matsakas, L., Chen, M., Rova, U., Christakopoulos, P., Zhu, J., and Shi, Y., 2019, Two important factors of selecting lignin as efficient lubricating additives in poly(ethylene glycol): Hydrogen bond and molecular weight, Int. J. Biol. Macromol., 129, 564–70.

[18] Karmakar, G., and Ghosh, P., 2015, Soybean oil as a biocompatible multifunctional additive for lubricating oil, ACS Sustainable Chem. Eng., 3 (1), 19–25.

[19] Mohammed, A., Dhedan, R., Mahmood, W., and Musa, A., 2021, Copolymers of castor and corn oils with lauryl methacrylate as green lubricating additives, Egypt. J. Chem., 64 (8), 4271–4276.

[20] Goodarzi, M., Toghraie, D., Reiszadeh, M., and Afrand, M., 2019, Experimental evaluation of dynamic viscosity of ZnO–MWCNTs/engine oil hybrid nanolubricant based on changes in temperature and concentration, J. Therm. Anal. Calorim., 136, 513–525.

[21] Minami, I., 2017, Molecular science of lubricant additives, Appl. Sci., 7 (5), 445.

[22] Ren, Y., Chen, Z., Du, H., Fang, L., and Zhang, X., 2017, Preparation and evaluation of modified ethylene–vinyl acetate copolymer as pour point depressant and flow improver for Jianghan crude oil, Ind. Eng. Chem. Res., 56 (39), 11161–11166.

[23] Karmakar, G., and Ghosh, P., 2013, Green additives for lubricating oil, ACS Sustainable Chem. Eng., 1 (11), 1364–1370.

[24] Upadhyay, M., and Ghosh, P., 2015, Shear stability and antiwear properties of three different viscosity modifiers for lube oil, J. Sci. Ind. Res., 74, 567–570.

[25] Morgan, S., Ye, Z., Subramanian, R., and Zhu, S., 2010, Higher-molecular-weight hyperbranched polyethylenes containing crosslinking structures as lubricant viscosity-index improvers, Polym. Eng. Sci., 50 (5), 911–918.

[26] Singh, R.K., Kukrety, A., Kumar, A., Chouhan, A., Saxena, R.C., Ray, S.S., and Jain, S.L., 2018, Synthesis, characterization, and performance evaluation of N,N-Dimethylacrylamide–alkyl acrylate copolymers as novel multifunctional additives for lube oil, Adv. Polym. Technol., 37 (6), 1695–1702.

[27] Elganidi, I., Elarbe, B., Ridzuan, N., and Abdullah, N., 2022, Synthesis, characterisation and pre-evaluation of a novel terpolymer as pour point depressants to improve the Malaysian crude oil flowability, J. Pet. Explor. Prod. Technol., 12 (7), 2067–2081.

[28] Roy, D., Paul, S., Yeasmin, S., and Ghosh, P., 2020, Synthesis of linseed oil based biodegradable homo and copolymers: Role as multifunctional greener additives in lube oil, J. Macromol. Sci., Part A: Pure Appl. Chem., 58 (1), 2–7.

[29] Faujdar, E., Negi, H., Singh, R.K., and Varshney, V.K., 2020, Study on biodegradable poly(α-olefins–co–α-pinene) architectures as pour point depressant and viscosity index improver additive for lubricating oils, J. Polym. Environ., 28 (11), 3019–3027.

[30] Upadhyay, M., Karmakar, G., Kapur, G.S., and Ghosh, P., 2018, Multifunctional greener additives for lubricating oil, Polym. Eng. Sci., 58 (5), 810–815.

[31] Saha, D.K., Upadhyay, M., and Ghosh, P., 2018, Dodecylmethacrylate – olive oil copolymers as potential biodegradable pour point depressant for lubricating oil, Pet. Sci. Technol., 36 (3), 215–221.

[32] Maleque, M.A., Masjuki, H.H., and Sapuan, S.M., 2003, Vegetable-based biodegradable lubricating oil additives, Ind. Lubr. Tribol., 55 (3), 137–143.

[33] Talukdar, S., and Ghosh, P., 2020, Biodegradable vegetable oil polymer as a multifunctional lubricating oil additive, J. Macromol. Sci., Part A: Pure Appl. Chem., 57 (4), 244–249.

[34] Rudnick, L.R., 2017, Lubricant Additives: Chemistry and Applications, 3^rd Ed., CRC Press, Boca Raton, FL, US.

[35] Khalafvandi, S.A., Pazokian, M.A., and Fathollahi, E., 2022, The investigation of viscometric properties of the most reputable types of viscosity index improvers in different lubricant base oils: API groups I, II, and III, Lubricants, 10 (1), 6.

[36] Cosimbescu, L., Vellore, A., Ramasamy, U.S., Burgess, S.A., and Martini, A., 2018, Low molecular weight polymethacrylates as multi-functional lubricant additives, Eur. Polym. J., 104, 39–44.

[37] Nassar, A.M., Ahmed, N.S., Kamal, R.S., Abdel Azim, A.A.A., and El-Nagdy, E.I., 2005, Preparation and evaluation of acrylate polymers as viscosity index improvers for lube oil, Pet. Sci. Technol., 23 (5-6), 537–546.

[38] Yetgin, S., 2020, Characterization of lubricant polyethylene waxes, Eur. J. Tech., 10 (2), 489–500.

[39] Nasser, R.M., Ahmed, N.S., and Nassar, A.M., 2015, Terpolymers for modifying the performance properties of engine oil, Appl. Petrochem. Res., 5 (1), 61–69.

[40] Deka, B., Sharma, R., and Mahto, V., 2020, Synthesis and performance evaluation of poly (fatty esters-co-succinic anhydride) as pour point depressants for waxy crude oils, J. Pet. Sci. Eng., 191, 107153.

[41] Jalal, M.A., Khalaf, M.N., and Hussein, M.A., 2021, Drag reduction assessment of some new copolymers of 1-hexene and maleic anhydride in light crude oil, Pet. Sci. Technol., 39, 632–645.

[42] Jalal, M.A., Khalaf, M.N., and Hussein, M.A., 2021, Synthesis of branched copolymers of poly(1-hexene-co-maleic anhydride), Basrah J. Sci., 39 (1), 135–148.

[43] Nadkarni, R., 2007, Guide to ASTM Test Methods for the Analysis of Petroleum Products and Lubricants, 2^nd Ed., ASTM International, West Conshohocken, PA, US.

[44] Soliman, E.A., Elkatory, M.R., Hashem, A.I., and Ibrahim, H.S., 2018, Synthesis and performance of maleic anhydride copolymers with alkyl linoleate or tetra-esters as pour point depressants for waxy crude oil, Fuel, 211, 535–547.

[45] Ghosh, P., Das, M., Upadhyay, M., Das, T., and Mandal, A., 2011, Synthesis and evaluation of acrylate polymers in lubricating oil, J. Chem. Eng. Data, 56 (10), 3752–3758.

[46] Nassar, A.M., Ahmed, N.S., Haseeb, M.E., Abdel-Rahman, A.A.H., and Nasser, R.M., 2017, Synthesis and evaluation of terpolymers as viscosity index improvers and pour point depressants, Pet. Coal, 59 (4), 442–451.

[47] Mohamad, S.A., Ahmed, N.S., Hassanein, S.M., and Rashad, A.M., 2012, Investigation of polyacrylates copolymers as lube oil viscosity index improvers, J. Pet. Sci. Eng., 100, 173–177.

[48] Ahmed, N.S., Nassar, A.M., Nasser, R.M., Haseeb, M.E., and Abdel-Rahman, A.A.H., 2017, Studies on the efficiency of some terpolymers based on alkylacrylates as lube oil additives, Pet. Coal, 59 (6), 847–855.

[49] Shara, S.I., Eissa, E.A., and Basta, J.S., 2018, Polymers additive for improving the flow properties of lubricating oil, Egypt. J. Pet., 27 (4), 795–799.

DOI: https://doi.org/10.22146/ijc.90670